Mask



FIG. 1 is a top front right-side perspective view of a mask, showing my new design;

FIG. 2 is a bottom rear left-side perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left-side view thereof;

FIG. 6 is a right-side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof. 

CLAIM The ornamental design for a mask, as shown and described. 